.car-btn{
    box-sizing: border-box  ;
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    bottom:20%;
    right: 20px ;
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: #FEFEFE;
    box-shadow: 0px 4px 10px 0px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    /* overflow: hidden; */
    padding: 5px;
    border: 2px solid #FEFEFE
  }
  .car-btn:hover{
    background-color: #f5f5f5;
  }
  
  .car-num{
    position: absolute  ;
    top: 3px;
    right: 2px;
    width: 20px;
    height: 20px;
    background: #0071E3;
    border-radius: 50%;
    color: #FEFEFE;
    text-align: center;
    line-height: 20px;
    font-size: 12px;
  
  }
  .car-img{
    width: 24px;
    height: 24px;
  }